argonautphotoStaring down what could be a 1,000ft deep worm hole through the blue ice of the Lower #RuthGlacier. I was never afraid of the ones full of water, they'd just be cold, but some had no water and it was easy to imagine a long slide to an icy death. #yikes (on assignment for @natgeo in #DenaliNationalPark) Find out how I got this assignment in an article posted on proof.nationalgeographic.com today.